Fix typo in handoff_check comment

Co-Authored-By: Matthew Ahrens <mahrens@delphix.com>

module/zfs/dsl_dataset.c

@@ -3087,7 +3087,7 @@ dsl_dataset_handoff_check(dsl_dataset_t *ds, void *owner, dmu_tx_t *tx)
 	uint64_t holds = zfs_refcount_count(&ds->ds_longholds) -
 	    (owner != NULL ? 1 : 0);
 	/*
-	 * The value of dd_activity_waiters can chance as soon as we drop the
+	 * The value of dd_activity_waiters can change as soon as we drop the
 	 * lock, but we're fine with that; new waiters coming in or old
 	 * waiters leaving doesn't cause problems, since we're going to cancel
 	 * waiters later anyway. The goal of this check is to verify that no